Blood Guard | Carter Roy

Thirteen-year-old Ronan Truelove leaves school one day and discovers he's a member of The Blood Guard - an ancient order of protectors. He will acquire invaluable skills (in swordfighting, subterfuge and more); learn that he has magical talents he never dreamed of; rescue his parents from certain death and finally fall for the wrong girl and overlook the right one. Only then will he find out his true purpose: guarding a geeky girl computer genius, and by saving her, save the world.